body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: url('../img/bg.jpg') no-repeat center center fixed;
    background-size: cover;
    color: #fff;
}

.container {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.card {
    background-color: rgba(0, 123, 255, 0.85); /* halbtransparentes Blau */
    border-radius: 1rem;
    padding: 40px;
    width: 100%;
    max-width: 460px;
    box-shadow: 0 0 20px rgba(0,0,0,0.5);
}

h3 {
    font-size: 28px;
    font-weight: bold;
    text-align: center;
    margin-bottom: 30px;
    color: #fff;
}

.form-label {
    color: #fff;
    font-size: 17px;
    margin-bottom: 4px;
    display: block;
}

.form-control {
    margin-bottom: 18px;
    height: 40px;
    font-size: 15px;
    display: block;
    width: 100%;
}

.input-group {
    margin-bottom: 18px;
}

.btn-register {
    background-color: #000;
    color: #fff;
    border: none;
    font-weight: bold;
    font-size: 16px;
    margin-top: 10px;
    width: 100%;
    height: 45px;
}

.btn-register:hover {
    background-color: #222;
    color: #fff;
}

.text-note {
    font-size: 14px;
    color: #e0e0e0;
    text-align: center;
    margin-top: 20px;
}